Founded in 1920, it stated its primary goal as being "to guarantee a good working life for its members". A main priority was taking part in the collective bargaining process. Workplace health and safety issues, competence and career issues were other major concerns. The organization also played an active part lobbying politicians in the interest of its members.
The 350 000 members worked in the private sector, in companies that operated in areas including IT, telecom, construction, manufacturing and research and development. A small number was self-employed. Membership was also open to students. Around 40 percent of the members were women, as was the current President, Mari-Ann Krantz who after the fusion with HTF became the first President of Unionen.
The organization was not only one of the largest labour unions in Sweden, it was also one of the wealthiest. It had funds worth several hundred million dollars, allowing the union to set aside substantial money for large ad campaigns with the object of recruiting new members.
The organization had in the end of its existence 20 Regional Divisions with 23 local offices around Sweden and approximately 2.500 local union branches in the workplaces. About half the members did not belong to a local branch but could turn to a workplace representative acting as a point of contact and a channel for information.
The highest decision-making body was the Congress, held every four years. It consisted of 180 elected representatives from the workplaces. The Congress elected the 11 representatives of the Sif Executive.
The Swedish Union of Clerical and Technical Employees in Industry maintained independence from party politics. The organization was an affiliate of the Swedish Confederation of Professional Employees. It was also a member of several international industrial federations, such as Union Network International, a federation of unions in the IT, telecom, media & entertainment and graphics sector.